According to the physical state
media may be:
Growth is visualized as
(macroscopic products of 20-30 cell divisions of
a single bacterium on a solid medium)
Loopful of the specimen
Solid media are preferable:
Isolation in pure culture.
effect on medium).
Types of culture media:
1) Simple media
2) Enriched media
3) Selective media
4) Enrichment media
5) Indicator media
6) Selective and indicator media
1) MacConkey’s medium:
a) Is an enriched medium.
b) Is an enrichment medium.
c) Contains phenol red as a pH indicator.
d) Gives pink colonies by lactose fermenting
e) Gives green colonies by lactose non-fermenting
2) Blood culture technique is used to
a) Sore throat
c) Skin infection
3) All are correct about enrichment media
a)They are solid media.
b) Blood agar is not considered an enrichment
c)They have selective properties.
d)They help multiplication of certain species and
e)They include selenite broth.
4) All are correct about chocolate agar
a) It is an enrichment medium.
b) It contains heated blood.
c) It is used to grow fastidious organisms.
d) It is an enriched medium.
e) It is brown in colour.
5) One of the following is used to grow strict
a) Selenite broth
b) MacConkey’s medium
c) Blood agar
d) Lowenstein-Jensen medium
e) Robertson’s cooked meat medium
6) When strict anaerobes are grown in the
a)They must be inoculated on cooked meat medium.
b)They can be grown on blood agar plates.
c) 50% carbon dioxide must be added.
d) The hydrogen released acts as a catalyst.
e)The palladium in the system acts as a nutrient.